Adaptive anti-jamming algorithm based on blind source separation

Generally, there are suppress jamming and forward jamming in the satellite navigation system. Since suppress jamming is much stronger than the satellite signal, using the power inversion algorithm can form the required nulling. Because the strength of forward jamming can be compared with the satellite signals, there are a series of difficulties in forming nulling of interference. The paper studies the situation when the useful signal and jamming signal power are almost the same, and employs fast independent component algorithm (FastICA)combining with direction of arrival(DOA)and beam-forming algorithm to control the interference. With the simulation result, we confirm the feasibility of the proposed method which brings a new thinking to the anti-jamming weak signals.